. The street railway review . l cable would remain suspendedfrom the top of the bracket. As the trolley is attached to the steelcable every 10 ft., breaks will seldom occur, and, even if oneshould take place, not more than 10 ft. of trolley wire would be catenary construction provides a practically level trolley, withno sudden bends at the insulators, such as is often found with theordinary suspension. This point is of particular advantage in high-speed service. The trolley wire is suspended 18 ft. above the track. Where the tracks are in the streets, the poles are set on the sidesof
. The street railway review . l cable would remain suspendedfrom the top of the bracket. As the trolley is attached to the steelcable every 10 ft., breaks will seldom occur, and, even if oneshould take place, not more than 10 ft. of trolley wire would be catenary construction provides a practically level trolley, withno sudden bends at the insulators, such as is often found with theordinary suspension. This point is of particular advantage in high-speed service. The trolley wire is suspended 18 ft. above the track. Where the tracks are in the streets, the poles are set on the sidesof the streets and the trolley suspended from span wires. Other-wise, the construction is the same as along the private right of way. The overhead material for the entire line construction was sup-plied by the Westinghouse company according to designs and speci-fications of Sargent & Lundj-. The entire system is provided with two metallic circuit telephonelines, one of which is reserved exclusively for the train dispatcher;. NEAR JULIETTA. IND. the other line is intended for general company business. Each carcarries a telephone, so that communication can be had with the traindispatcher at intervals of 2,000 ft. Telephone wires are carriedon porcelain insulators on cross-arms near the tops of the trolleypoles. The wires are transposed every 500 ft. in order to avoiddisturbance by the current in the transmission lines. The poles are all of selected white cedar; those for the centertrolley construction are 40 ft. long with 7-in. tops, and the sidepoles for the high-tension lines are 35 ft. long with 7-in. tops. Allpoles are set 6 ft. in the ground and are carefully tamped; are used for the streets in the cities where there are no feed 90 STREET RAILWAY REVIEW. [Vol. XV, No. 2. wires and the poles arc used only to support the span wires; whileon the other side, where the high-tension lines run, the poles varyin height from 40 ft. to 60 ft. so as to
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